Granted Patent
Utility
US 6,487,247 · App. 09/991,662
Method of protection of data transmission according to both data specific protection data and additional protection data
Inventor:
Takayuki Sugahara
Patented Case
View Patent ↗
Granted: Nov 26, 2002
Filed: Nov 26, 2001
Inventor
Takayuki Sugahara
Assignee (at issue)
Victor Company of Japan, Ltd.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.